Concrete-pump.



G. A. CORNELL & S. E. MUKEE.

CONCRETE PUMP1 APPLIOATION FILBD Anm, 191s.

Patented Apr. 21, 1-914 WITNESSES UNITED srArEs PATENT# onirica.

CHARLES A. C].`\.1\ELL, OF HOLLYWOOD, :AND SAMUEL CALIFORNIA.

CONCRETE-rum?.

Specication of Letters Patent.

l Patented Apr. 21, 1914.

Application led April 3, 1913. Serial No. 759,920.

- ing downwardly, partly in plan and partly.

in section. Fig. 2 1s a side view partly in elevation and partly in section. Fig. I3 is.

a vertical cross section on the line 3--3 of Fig. l. f

The I-beams 1 and 2 are mounted in parallelpositions. The crank shaft 3 is mounted upon the I-beams near their rear ends. The driving shaft 4 ismounted behind the crank shaft 3, there being a driving pulley 5 upon one end, and a pinion 6 upon the` other end meshes with a larger spur gear 7 Y upon the crank shaft 3. The pump head 8 is mounted upon the front ends of the I- beams and has an inverted T-shaped cham# ber 9. The pump cylinder 10 is connected to the rear end of the chamber 9, the pump piston l1 is mounted in the chamber 9 and connected to the crank shaft 3. The housing plate 12 is'secured to the front face of the pump head 8, so as to form a connection for the delivery pipe 13 and so as to make the gate valve chamberA 14. The gate valve 15 is mounted in the gate valve chamber 14 so as to open and close the passage 16 to the delivery pipe 13. A gear rack 17 extends from the gate valve 15 and meshes with the pinion 18 uponl the counter shaft 19, said counter shaft extending diametrically across the outer face of the gear 7. The bevel pinions 20 and 21 are fixed upon the counter shaft 19,.one on each side of the E. MCKEE, or Los'ANGELEs,

center of the gear 7. The bevel segment 22 is mounted upon the outerface of the gear 7 1n position to mesh with the pinions 20 and 21, so as to open and close the gate valve. The wing valve 23 is mounted in the vertical passage of the chamber 9, so as to swing upwardly and close the passage and Swing downwardly to open the passage. The hopper 24 is mounted upon the pump head 8 anddischarges into the chamber 9. Thev material placed in the hopper will be drawn downwardly by the backL wardjmovement of the piston and forced through thedelivery pipe by the forward movement.

We clalm: `In a concrete pulnp, a pump headv having `a chamber leading forwardly and backwardlyand upwardly, a pump cylinder con-' nected to the back end of the chamber, a

hopper connected to the lupper end of the chamber, a wing valve controlling the passage from the hopperto the chamber,a delivery pipe connected to the forward endof the chamber, a gate valve controlling the passage to the delivery pipe, a gear rack upon the gate valve,

piston, and a -counter shaft connected to the gate valve rack and intermittently connected to the crank shaft.

' CHARLES A. CORNELL.

. SAMUEL E. MCKEE.`

Witnesses:

' BEnTHA MCMASTER, VSEMER G..WELLs.

l a piston in thepump cylinder, a1 crank shaft for operating the 75 

